Look pretty good. I would make a bigger base for the pedestal though. It would help spread some of the weight out and beef it up as a whole quite a bit. Even if the base is bolted through the deck, a wider base would help. I promise you as time goes, they will experience some sort of stress from the side. If you are using screws to fasten it to the deck or rail, they could strip easily. Other than that, I don't see why they wouldn't be a fine addition to a fishing rig.
Good Job!
CR